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Posted: Wed Jul 28, 2004 12:09 am
by Sparkie
@Wolf - You're missing the SetWindowCallback. Add it just before you take the Snapshot()
Code: Select all
SetWindowCallback(@myWindowCallback())
snapshot()
Posted: Wed Jul 28, 2004 12:29 am
by Wolf
Oh yes
I now add it and work perfect.
Sparkie i always thank you for your nice helps
Best regards.
Posted: Wed Jul 28, 2004 12:34 am
by Sparkie
Always glad to help Wolf
I'll let you know if and when I find a better method of handling the Video Source window.
Re: Help with webcam or video stream
Posted: Tue Oct 20, 2009 11:47 pm
by real
Sorry for re-opening this topic...
Could anybody give me an example, how to change the resolution to 640 x 480 pixels without any dialogs... please? I'd like to make a snapshot in 640 x 480 and this is supported by the webcam, but standard webcam is a resolution of 352 x 288 pixels.
Thanks,
René
Re: Help with webcam or video stream
Posted: Wed Oct 21, 2009 2:52 am
by Sparkie
I believe WM_CAP_SET_VIDEOFORMAT will do what you want. I won't have time to try it out until this weekend.
Re: Help with webcam or video stream
Posted: Wed Oct 21, 2009 10:36 am
by real
Okay, I know that i have to pass it via SendMessage_() to the capture window, but I'm note sure about the parameters to use.
Re: Help with webcam or video stream
Posted: Thu Oct 22, 2009 12:38 am
by Sparkie
See if this helps you until I have time to finish the code.
Code: Select all
bmi.BITMAPINFO
bmi\bmiHeader\biSize = SizeOf(BITMAPINFOHEADER)
;Use zero parameters to get current struct size
structSize = SendMessage_(hWndC, #WM_CAP_GET_VIDEOFORMAT, 0, 0)
;Now use corrected parameters to get info
SendMessage_(hWndC, #WM_CAP_GET_VIDEOFORMAT, structSize, @bmi)
;Change to a valid size only or crash will occur
bmi\bmiHeader\biWidth = 640
bmi\bmiHeader\biHeight = 480
bmi\bmiHeader\biSizeImage = bmi\bmiHeader\biHeight * bmi\bmiHeader\biWidth * 3
bmi\bmiHeader\biBitCount = 24
;Set new size
SendMessage_(hWndC, #WM_CAP_SET_VIDEOFORMAT, structSize, bmi)
capW = bmi\bmiHeader\biWidth
capH = bmi\bmiHeader\biHeight
SetWindowPos_(hWndC, 0, 0, 0, capW, capH, #SWP_NOMOVE | #SWP_NOZORDER | #SWP_FRAMECHANGED)
UpdateWindow_(hWndC)
Re: Help with webcam or video stream
Posted: Tue Dec 28, 2010 9:51 pm
by max_aigneraigner@web.de
doesn't function on windows 7
neither with PB nor c++..
alternative?